3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
4 * Written by David Howells (dhowells@redhat.com)
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #define FSCACHE_DEBUG_LEVEL THREAD
13 #include <linux/module.h>
14 #include <linux/proc_fs.h>
15 #include <linux/seq_file.h>
21 atomic_t fscache_n_op_pend
;
22 atomic_t fscache_n_op_run
;
23 atomic_t fscache_n_op_enqueue
;
24 atomic_t fscache_n_op_requeue
;
25 atomic_t fscache_n_op_deferred_release
;
26 atomic_t fscache_n_op_release
;
27 atomic_t fscache_n_op_gc
;
28 atomic_t fscache_n_op_cancelled
;
29 atomic_t fscache_n_op_rejected
;
31 atomic_t fscache_n_attr_changed
;
32 atomic_t fscache_n_attr_changed_ok
;
33 atomic_t fscache_n_attr_changed_nobufs
;
34 atomic_t fscache_n_attr_changed_nomem
;
35 atomic_t fscache_n_attr_changed_calls
;
37 atomic_t fscache_n_allocs
;
38 atomic_t fscache_n_allocs_ok
;
39 atomic_t fscache_n_allocs_wait
;
40 atomic_t fscache_n_allocs_nobufs
;
41 atomic_t fscache_n_allocs_intr
;
42 atomic_t fscache_n_alloc_ops
;
43 atomic_t fscache_n_alloc_op_waits
;
45 atomic_t fscache_n_retrievals
;
46 atomic_t fscache_n_retrievals_ok
;
47 atomic_t fscache_n_retrievals_wait
;
48 atomic_t fscache_n_retrievals_nodata
;
49 atomic_t fscache_n_retrievals_nobufs
;
50 atomic_t fscache_n_retrievals_intr
;
51 atomic_t fscache_n_retrievals_nomem
;
52 atomic_t fscache_n_retrieval_ops
;
53 atomic_t fscache_n_retrieval_op_waits
;
55 atomic_t fscache_n_stores
;
56 atomic_t fscache_n_stores_ok
;
57 atomic_t fscache_n_stores_again
;
58 atomic_t fscache_n_stores_nobufs
;
59 atomic_t fscache_n_stores_oom
;
60 atomic_t fscache_n_store_ops
;
61 atomic_t fscache_n_store_calls
;
62 atomic_t fscache_n_store_pages
;
63 atomic_t fscache_n_store_radix_deletes
;
64 atomic_t fscache_n_store_pages_over_limit
;
66 atomic_t fscache_n_store_vmscan_not_storing
;
67 atomic_t fscache_n_store_vmscan_gone
;
68 atomic_t fscache_n_store_vmscan_busy
;
69 atomic_t fscache_n_store_vmscan_cancelled
;
71 atomic_t fscache_n_marks
;
72 atomic_t fscache_n_uncaches
;
74 atomic_t fscache_n_acquires
;
75 atomic_t fscache_n_acquires_null
;
76 atomic_t fscache_n_acquires_no_cache
;
77 atomic_t fscache_n_acquires_ok
;
78 atomic_t fscache_n_acquires_nobufs
;
79 atomic_t fscache_n_acquires_oom
;
81 atomic_t fscache_n_updates
;
82 atomic_t fscache_n_updates_null
;
83 atomic_t fscache_n_updates_run
;
85 atomic_t fscache_n_relinquishes
;
86 atomic_t fscache_n_relinquishes_null
;
87 atomic_t fscache_n_relinquishes_waitcrt
;
89 atomic_t fscache_n_cookie_index
;
90 atomic_t fscache_n_cookie_data
;
91 atomic_t fscache_n_cookie_special
;
93 atomic_t fscache_n_object_alloc
;
94 atomic_t fscache_n_object_no_alloc
;
95 atomic_t fscache_n_object_lookups
;
96 atomic_t fscache_n_object_lookups_negative
;
97 atomic_t fscache_n_object_lookups_positive
;
98 atomic_t fscache_n_object_created
;
99 atomic_t fscache_n_object_avail
;
100 atomic_t fscache_n_object_dead
;
102 atomic_t fscache_n_checkaux_none
;
103 atomic_t fscache_n_checkaux_okay
;
104 atomic_t fscache_n_checkaux_update
;
105 atomic_t fscache_n_checkaux_obsolete
;
107 atomic_t fscache_n_cop_alloc_object
;
108 atomic_t fscache_n_cop_lookup_object
;
109 atomic_t fscache_n_cop_lookup_complete
;
110 atomic_t fscache_n_cop_grab_object
;
111 atomic_t fscache_n_cop_update_object
;
112 atomic_t fscache_n_cop_drop_object
;
113 atomic_t fscache_n_cop_put_object
;
114 atomic_t fscache_n_cop_sync_cache
;
115 atomic_t fscache_n_cop_attr_changed
;
116 atomic_t fscache_n_cop_read_or_alloc_page
;
117 atomic_t fscache_n_cop_read_or_alloc_pages
;
118 atomic_t fscache_n_cop_allocate_page
;
119 atomic_t fscache_n_cop_allocate_pages
;
120 atomic_t fscache_n_cop_write_page
;
121 atomic_t fscache_n_cop_uncache_page
;
122 atomic_t fscache_n_cop_dissociate_pages
;
125 * display the general statistics
127 static int fscache_stats_show(struct seq_file
*m
, void *v
)
129 seq_puts(m
, "FS-Cache statistics\n");
131 seq_printf(m
, "Cookies: idx=%u dat=%u spc=%u\n",
132 atomic_read(&fscache_n_cookie_index
),
133 atomic_read(&fscache_n_cookie_data
),
134 atomic_read(&fscache_n_cookie_special
));
136 seq_printf(m
, "Objects: alc=%u nal=%u avl=%u ded=%u\n",
137 atomic_read(&fscache_n_object_alloc
),
138 atomic_read(&fscache_n_object_no_alloc
),
139 atomic_read(&fscache_n_object_avail
),
140 atomic_read(&fscache_n_object_dead
));
141 seq_printf(m
, "ChkAux : non=%u ok=%u upd=%u obs=%u\n",
142 atomic_read(&fscache_n_checkaux_none
),
143 atomic_read(&fscache_n_checkaux_okay
),
144 atomic_read(&fscache_n_checkaux_update
),
145 atomic_read(&fscache_n_checkaux_obsolete
));
147 seq_printf(m
, "Pages : mrk=%u unc=%u\n",
148 atomic_read(&fscache_n_marks
),
149 atomic_read(&fscache_n_uncaches
));
151 seq_printf(m
, "Acquire: n=%u nul=%u noc=%u ok=%u nbf=%u"
153 atomic_read(&fscache_n_acquires
),
154 atomic_read(&fscache_n_acquires_null
),
155 atomic_read(&fscache_n_acquires_no_cache
),
156 atomic_read(&fscache_n_acquires_ok
),
157 atomic_read(&fscache_n_acquires_nobufs
),
158 atomic_read(&fscache_n_acquires_oom
));
160 seq_printf(m
, "Lookups: n=%u neg=%u pos=%u crt=%u\n",
161 atomic_read(&fscache_n_object_lookups
),
162 atomic_read(&fscache_n_object_lookups_negative
),
163 atomic_read(&fscache_n_object_lookups_positive
),
164 atomic_read(&fscache_n_object_created
));
166 seq_printf(m
, "Updates: n=%u nul=%u run=%u\n",
167 atomic_read(&fscache_n_updates
),
168 atomic_read(&fscache_n_updates_null
),
169 atomic_read(&fscache_n_updates_run
));
171 seq_printf(m
, "Relinqs: n=%u nul=%u wcr=%u\n",
172 atomic_read(&fscache_n_relinquishes
),
173 atomic_read(&fscache_n_relinquishes_null
),
174 atomic_read(&fscache_n_relinquishes_waitcrt
));
176 seq_printf(m
, "AttrChg: n=%u ok=%u nbf=%u oom=%u run=%u\n",
177 atomic_read(&fscache_n_attr_changed
),
178 atomic_read(&fscache_n_attr_changed_ok
),
179 atomic_read(&fscache_n_attr_changed_nobufs
),
180 atomic_read(&fscache_n_attr_changed_nomem
),
181 atomic_read(&fscache_n_attr_changed_calls
));
183 seq_printf(m
, "Allocs : n=%u ok=%u wt=%u nbf=%u int=%u\n",
184 atomic_read(&fscache_n_allocs
),
185 atomic_read(&fscache_n_allocs_ok
),
186 atomic_read(&fscache_n_allocs_wait
),
187 atomic_read(&fscache_n_allocs_nobufs
),
188 atomic_read(&fscache_n_allocs_intr
));
189 seq_printf(m
, "Allocs : ops=%u owt=%u\n",
190 atomic_read(&fscache_n_alloc_ops
),
191 atomic_read(&fscache_n_alloc_op_waits
));
193 seq_printf(m
, "Retrvls: n=%u ok=%u wt=%u nod=%u nbf=%u"
195 atomic_read(&fscache_n_retrievals
),
196 atomic_read(&fscache_n_retrievals_ok
),
197 atomic_read(&fscache_n_retrievals_wait
),
198 atomic_read(&fscache_n_retrievals_nodata
),
199 atomic_read(&fscache_n_retrievals_nobufs
),
200 atomic_read(&fscache_n_retrievals_intr
),
201 atomic_read(&fscache_n_retrievals_nomem
));
202 seq_printf(m
, "Retrvls: ops=%u owt=%u\n",
203 atomic_read(&fscache_n_retrieval_ops
),
204 atomic_read(&fscache_n_retrieval_op_waits
));
206 seq_printf(m
, "Stores : n=%u ok=%u agn=%u nbf=%u oom=%u\n",
207 atomic_read(&fscache_n_stores
),
208 atomic_read(&fscache_n_stores_ok
),
209 atomic_read(&fscache_n_stores_again
),
210 atomic_read(&fscache_n_stores_nobufs
),
211 atomic_read(&fscache_n_stores_oom
));
212 seq_printf(m
, "Stores : ops=%u run=%u pgs=%u rxd=%u olm=%u\n",
213 atomic_read(&fscache_n_store_ops
),
214 atomic_read(&fscache_n_store_calls
),
215 atomic_read(&fscache_n_store_pages
),
216 atomic_read(&fscache_n_store_radix_deletes
),
217 atomic_read(&fscache_n_store_pages_over_limit
));
219 seq_printf(m
, "VmScan : nos=%u gon=%u bsy=%u can=%u\n",
220 atomic_read(&fscache_n_store_vmscan_not_storing
),
221 atomic_read(&fscache_n_store_vmscan_gone
),
222 atomic_read(&fscache_n_store_vmscan_busy
),
223 atomic_read(&fscache_n_store_vmscan_cancelled
));
225 seq_printf(m
, "Ops : pend=%u run=%u enq=%u can=%u rej=%u\n",
226 atomic_read(&fscache_n_op_pend
),
227 atomic_read(&fscache_n_op_run
),
228 atomic_read(&fscache_n_op_enqueue
),
229 atomic_read(&fscache_n_op_cancelled
),
230 atomic_read(&fscache_n_op_rejected
));
231 seq_printf(m
, "Ops : dfr=%u rel=%u gc=%u\n",
232 atomic_read(&fscache_n_op_deferred_release
),
233 atomic_read(&fscache_n_op_release
),
234 atomic_read(&fscache_n_op_gc
));
236 seq_printf(m
, "CacheOp: alo=%d luo=%d luc=%d gro=%d\n",
237 atomic_read(&fscache_n_cop_alloc_object
),
238 atomic_read(&fscache_n_cop_lookup_object
),
239 atomic_read(&fscache_n_cop_lookup_complete
),
240 atomic_read(&fscache_n_cop_grab_object
));
241 seq_printf(m
, "CacheOp: upo=%d dro=%d pto=%d atc=%d syn=%d\n",
242 atomic_read(&fscache_n_cop_update_object
),
243 atomic_read(&fscache_n_cop_drop_object
),
244 atomic_read(&fscache_n_cop_put_object
),
245 atomic_read(&fscache_n_cop_attr_changed
),
246 atomic_read(&fscache_n_cop_sync_cache
));
247 seq_printf(m
, "CacheOp: rap=%d ras=%d alp=%d als=%d wrp=%d ucp=%d dsp=%d\n",
248 atomic_read(&fscache_n_cop_read_or_alloc_page
),
249 atomic_read(&fscache_n_cop_read_or_alloc_pages
),
250 atomic_read(&fscache_n_cop_allocate_page
),
251 atomic_read(&fscache_n_cop_allocate_pages
),
252 atomic_read(&fscache_n_cop_write_page
),
253 atomic_read(&fscache_n_cop_uncache_page
),
254 atomic_read(&fscache_n_cop_dissociate_pages
));
259 * open "/proc/fs/fscache/stats" allowing provision of a statistical summary
261 static int fscache_stats_open(struct inode
*inode
, struct file
*file
)
263 return single_open(file
, fscache_stats_show
, NULL
);
266 const struct file_operations fscache_stats_fops
= {
267 .owner
= THIS_MODULE
,
268 .open
= fscache_stats_open
,
271 .release
= seq_release
,